Press having spring-pressed blank holders



Nov. 27,1923. 1,475,437

W. KLOCKE PRESS HAVING SPRING PRESSED BLANK HOLDERS I Filed June so 1921 2 sheets-sheet 1 5mm/nto?,

K/VOCK 00T Nov. 27, 1923. 1,475,437

W. KLOCKE PRESS HAVING SPRING PREssED BLANK HOLDERS Filed June 3o 1921 2 Sheets-Sheet 2 m. Mw A f- SNNL u* Patented Nov. 2T, 192s.

, y l1,475,437 PATENT orf-"rca,

'WILLIAM KLOCKE, 0F WOODBAVEN, NEW YORK, ASSIGNQB TO E. W. BLISS COMPANY;

v F BROOKLYN, NEW YORK, A CORPORATION OF WEST VIRGINIA.

PRESS HAVING SPRING-PRESSED BLANK HOLDERS.

Application led June 30, 1921. Serialli'o. 481,683.

To all whom t may concern.'

Be it known that I, WILLIAM KLooKn, a

citizen of the United States ofl America, re-

siding in ,Woodhavem in the county of 5 Queens, city and State of New York, have invented certain Vnew and useful Improvements in Presses Having Spring-Pressed Blank Holders, of which the following is a specification.

This invention relates to drawing presses of the spring pressed blank holder type, and aims to provide improvements therein.

The invention provides a drawin press of the character in question in which the resistance of the blank-holder at different points thereof may be readily, precisely and extensively varied, whereby the resistance of the blank holder may be nicely adjusted to the requirements of work 'of vanious shape.

The invention further provides a mechanism which may be readily changed forspring pressures beyond' or less than the range of adjustment or strength of the '25 spring mechanism which may be in use at any particular time, and which may further admit of the change being made without the workman getting beneath thel press or into a pit below the press.

The invention further provides a mechanism which is relatively simple and inexpensive, which may be composed largely of simple parts readily procured in the market or manufactured, and which may be applied as an attachment to existing presses.

The invention further provides a novel combination of parts, as herein more fully described.

Two embodiments of the invention are illustrated in the accompanying drawings, in which,- j

Figure l is a view in section of a press comprising the invention, only such parts of the press being shown as are necessary to disclosev the invention.

Fig. 2 is a similar view of a second embodiment of the invention.

Referring to said drawings, numerals 10 and 11 illustrate the complementar forming parts of the press, the part 10 being here shown as a die, and the part 11 as a punch, and the die is here shown as movable toward and from the punch by suitable mechanism (not shown): The punch .is here .metal X against 'the die durin tie pleces convenientlfy shown as mounted upon a fixed part of the press, as for example, a lbolster plate 12 resting on the bed 13.

l5 lndicates a vblank holder adapted to press the marginal portion of the sheet 'of the action of the punch against the sheet to prevent sald marglnal portion from buckling, and wrinkles ein formed -in the drawn article.

Means 20 or resisting the movement of the blank holder is provided', and this means conveniently comprises one or more spring mechanisms 21, and preferably a plurality of sald spring mechanisms 21, especially where differential resistance is to be imparted to a circumferential portion of the blank holder 15. The sp-ring mechanisms 21 are conveniently supported at one end from a frame 0r beam 23, attached to and preferably formed separate from the bed 13. The separate frame 23 is conveniently attached to the bed 13 by'means of threaded bolts or the like 25, by means of which the position of the frame 23 may be changed or adjusted as hereinafter more fully explained. The springs 27 of the spring mechanism are connected, at the lower ends, to the said support or frame 23 by means of suitable tie pieces 30. These project through openings 31 inthe rame 23 and conveniently allow the spring mechanism to be withdrawn throu h the upper side thereof. This feature is o? advantage in putting in, and taking out, and adjusting the spring mechanisms where long springs are employed, which springs conveniently project into. pits provided below the bottom of the press or floor level.

Moreover, inasmuch as spring pressures of various strength and character are required for doing diiferent work, the spring mechanisms are conveniently of a character which admit of replacement of the springs by different size springs, or by longer or shorter springs. To this end, the tie pieces are conveniently in the form of readily procurable and formed parts, such as the threaded rod 33, Figure 1, or the pipe or tube 35, Figure 2. These pipes or rods are ordinary articles in the market and' are readily cut to the proper length and fitted to the spring mechanism Moreover, the springs are conveniently ing means '4:0 is provided for adjusting-the posltion of the collar 39 and the tension of the spring. lin the construction shown in Figure l, the adjusting means is conveniently in the form of a-nut threaded upon screw threads 42 formed on the rod' 33, and in Figure 2'the said means l0 is conveniently in the form of a threaded screw engaging threads in acap 45 threadedupon the lower end of the pipe 35. The threads in the cap t5 are conveniently 'termed in a nut t6 seated in a recess in the said cap 45.

ln the embodiment shown in Fig. 2, the tie piece 30 abuts against the frame 23 through a shoulder l? conveniently a part of a cap or annulus t9 threaded upon the pipe 35. ln the construction shown in Figure 1,-the tie piece 30 conveniently abuts the iframe 23 through a hanger ori' stirrup 50. The stirrup 50 is conveniently in the form of a short pipe or tube 52 having a lower cap 53 to which one e-nd of the rod 33 is connected, 'and an upper cap or annulus 55, bearingv on the frame 23., conveniently through a ball ring 58 seated' upon a ball seat 59 in the support 23, and thus enables the spring mechanism 20 to have limited universal movement. rllhe embodiments shown in Figures l and 2 show that the spring mechanism 21 may or may not be supported in the frame 20 so as to have universal movement, as may be desired.

'.lhe resistance of the spring mechanism 20 is transmitted to the blank holder l5 by any Suitable mechanism 60. rl`his mechanism may conveniently comprise a plurality of pins 62 bearing at opposite ends against the blank holder l5, and a plate 63, respectively.

A. plurality of pins 65, one foreach spring Amechanism 20 conveniently bear agamst the underside of the plate 63, the slide 67 bearing upon one end oit the springs, directly as in the embodiment of Fig. 2, and indirectly through pins 68 and a collar 69, as in the embodiment shown in Figure l.

To adjust the device so that a greater (or less) resistance may be imparted to the blank holder 15 at the desired point than at other points, one or more of the bolts 25 may be turned to draw the support 23 toward i' or from the bed, thereby imparting greater 'or less tension to the adjacent spring mechanisms. By reasons of the ball and socket joint between the support 23 and spring mechanisms, the said spring mechanisms can adjust themselves in the seats 59, so as that the springs may lreact in a substantially direct line to the pressures imtemeer parted to the blank holder 15. Buckling or side thrusts of the springs are thereby avoided and the consequent irregularity of the spring action is thereby avoided.

Adjustment of the resistance of the blank holder at certain points may also be obtained, together with, or'independently of, adjusting means 25, by means of the adjusting 'means 40, or by replacement of one spring mechanism by another, which spring mechanism may be diii'erent from its associated spring mechanisms. By varying the resistanceoliered by the several spring mechanisms 20 a di'erential pressure at relatively precise or definite points of the blank holder l5 may be obtained, which result could not be obtained by adjustments common to the several spring mechanisms, as for example such adjustment as is ettected by the means 25.

The inventive ideas hereiniset forth may receive other embodiments than those herein specifically illustrated and described.

What is claimed is:

1 A drawing press comprising a blankholder, and means for resisting the movement of said blank-holder, said means comprisinga spring support and a plurality of springs between said blank-holder and spring support, means in conjunction with individual springs tor adjusting the force or resistance thereof, whereby greater resistance may be imparted to said blankholder at predetermined points than at other points, said spring support comprising a frame common to a plurality of said springs, and means for adjusting the position of saidvtrame, wherebythetorce or resistance of the several springs bearing therein, may be simultaneously varied.

2. A drawing press comprising a blankholder-,and means for resisting the movement of said. blank-holder, said means comprising a spring support and a plurality ofv springs between said blank-holder and spring support, means in conjunction with.

individual springs 'for-adjusting the force or resistance thereof, whereby greater resistance may be imparted to said blankholder at predetermined points than at other points, said spring support comprising a tramel common to a plurality of said springs, and means for adjusting the position of said trame` whereby the force or resistance of the several springs bearing therein, may be simultaneously varied, said springs projecting below said frame.

3. A drawing press comprising a blankholder, and means for resisting the movement of said blank-holder, said means comprising a spring support, a plurality of springs reacting separately at different points against said blank-holder, and a tie piece for individual springs attached at its ioo -points against said blank-helder, and a tiepiece for individual springs attached-at its upper end to said spring support, and hav-' ing an abutment at its lower end for one end ,of said spring, said spring support and tie- `piece having a connection permitting removal oi' said tie-piece and springs through said s ring support.

5. drawing press comprising a blankholder, and means for resisting the movement o'l' said blank-holder, said means com- 10 prising a spring support, a plurality of springs reacting separately at different points against said blank-holder, and a tiepiece for individual springs attached at its upper end to said spring support, and having au abutment at its lower end for one end of said spring, said abutment being adjustable on said tie-piece.

6. A drawing press comprising a blankholder, and means for resisting the movement ot said blank-holder, said means comprising a spring support, a plurality of springs reacting separately at different points against said blank-holder, and a tiepiece for individual springs attached at its upper end to said spring support., and hav-- ing an abutment at its lower end for one end of said spring, said tie-piece comprising a replaceable part, replaceable for springs of different length.

7. A drawing press comprising a blankholder, and means for resisting the movement of said blank-holder, said means comprising a spring support, a plurality of springs reacting separately at different points against said blank-holder, and a tiepiece for individual springs attached at its upper end to said spring support, and having an abutment at its lower end for one end of' said spring, said tie-piece comprising a rod and a hanger to which said rod is attached at one end.

8. A drawing press comprising a blankholder, and means for resisting the movement of said blank-holder, said means comprising a spring support,v a plurality of springs react-ing separately at different points againstsaid blank-holder, and a tiepiece for individual springs attached at its upper end to said spring support, and hav- 50 ing an abutment at its lowerlend for one end of said spring, said tie-piece comprising va rod, and a hanger to which said rod is attached at one end, said hanger having a bearing capable of universal movement.

9. A drawing press comprising a blank holder, and means for resisting the movement ol' said blank-holder, said means comprising a spring support, a plurality ot springs reacting separately at different polnts against said blank-holder,A a tie-piece -for individual springs attached at its upper end to said spring support, and having an abutment at its lower end for one end of said spring, said tie-piece comprising a rod, a hanger to which said rod is attached at one end, a collar guided on said hanger, against which said spring bears, and connections between said blank holder and collar.

10. A drawing press comprising a blankholder, and means for resisting the movemeut of said blank holder, said means comprising va spring support, a plurality of springs reacting separately at different points against said blank-holder, a tie-piece for individual springs attached at its upper end to said spring support, and having an abutment at its lower end for one end of said spring, said tie-piece comprising a rod, a hanger to which said rod is at tached at one end, a collar guided on said rod, against which Said spring bears, and connections between said blank-holder and collar, said connections comprising a pin passing through said hanger.

l1. A drawing press comprisng a blankholder, and means for resisting the movement of said blank-holder, said means comprising a spring support, a plurality of springs reacting separately at different points against said blank-holder, a. tie-piece for individual springs attached at its upper end to said spring support, and having an abut-ment at its lower end for one end of said spring, said tie-piece comprising a rod, a hanger to which said rod is attached at one end, a collar guided on said rod, against which said spring bears, connections between said blank-holder and collar, said hanger comprising a short tube and end pieces adapted to bear on a part of the press frame, and to receive the end of Said rod.

12. A drawing press comprising a blankholder, and means for resisting the movement of said blank-holder, said means comprising a spring support, a plurality of springs reacting separately at different points against said blank-holder, a tie-piece for individual springs attached at its upper end to said spring support, and having an abutment at its lower end for one end of said spring, said tie-piece comprising a rod, a spring supporting collar at the lower end of said rod, and means for adjusting the poition of said collar on the end of said ro 13. A drawing press comprising a blankholder, and means for resisting the movement of said blank-holder, said means comprising a spring support, a plurality of l points against said blank-holder, anda' tiepiece forv individual springs attached at its upper end to said spring support, and having an abutment at its lower endfor one end of said spring, said tie-piece comprisinga rod, a lurality of collars thereon, and said spring eing in sections spaced between said collars.

14. A drawing press comprising a blankholder, means for resisting the movement of said blank-holder, and means for transmitting the motion 'of said blank-holder to said resisting means, said latter means comprising a coil spring, having its axis substantially in line with the line of motion of said transmitting means, a spring support, and a bearing between said spring 'and spring support permitting universal movement whereby said support may adjust .itself to bring the axis of said spring in close alinement with the line of action of said transmitting means.

15, A drawing press comprising a blankholder, means for resisting the movement of said blank-holder, and means for transmitting the motion of said blank holder to said resisting means, said latter means comprising a coil spring, having its axis substantially in line with the line oi motion or" said transmitting means, a spring support, a tiepiece, and a `bearing between said support and spring mechanism permitting universal manner movement whereby said support may adjust itself to brin the axis of said spring in close alinement with the linev of action of said transmitting means.

16. A. drawingpress comprising a blankholder, means for resisting the movement of .said blank-holder, and -means for transmitting the motion or.' said blank-holder to said resisting means, `said latter means comprising a coil spring, having its axis substantially in line with the line of motion of said transmitting means, a s ring support, a tie rod, a hanger, and a earing between said hanger and support permitting universal movement whereby said support may adjust itself to bring the axis oit said spring in close alinement with the line oit action of said transmitting means. p 17. A dra-wing press comprising a blankholder, and means for resisting the movementl of said blank-holder, said vmeans4 comprising a plurality of spring mechanisms, reacting separately at diderent points against said blank-holder, means for adjusting the resistance of individual springmechanisms, and means for simultaneously adjusting the resistance of a plurality of v said spring mechanisms.

vlin witness whereof, l have hereunto signed WllLLlAM KLOCKE. 

